Motor working in a bore hole by



Sept. 27, 1938. 2,131,392

MOTOR WORKING IN A BORE HOLE BY MEANS OF A RINSING LIQUID I T. SEIFEIR I Filed Nov. 1, 1955 2 Sheetse-Sheet 1 NNE O 7 6 rnLLvv v .SEEY Y 4 'r. SEIFER 2,131,392

MOTOR WORKING IN A BORE HOLE BY MEANS A RINSING LIQUID Sept. 27, 1938.

Filed Nov. 1, 1935 2 Sheets-Sheet 2 7 Q Mm!- Patented Sept. 27, 1938 i v a UNITED STATES PATENT OFFICE Moron woimmo m A norm- HOLE BY MEANS or a nmsmo LIQUID Theo Selter, Berlin, Germany Application November 1, 1935, Serial No. 47,890

In Germany September 23,1933

6 Claims. (01.255-4) This invention relates to hydraulic motors operformed. l designates the valvebody. 3 is a rod ated in a bore-hole by means of the flushing fluid cooperating with the valve body 1, 9 and-I are in which the chisel is fixed to a cylinder which slots provided in the tubing l. II are-ducts for slides on a piston connected with the tubing. the releasing liquid. l2 isapiston connected :to

5 Such motors are controlled by spring-actuated the .Valve l} the Valve 7 a u e valves. When closed these valves are subject to P io S own in i he passage in the b-- an hydrau ic pressure corresponding to the 8 s c sed- OW W t e. flus Water weight of the mass to be raised, and this pressure enters the cyl nder above t e P sto 4 S0 t has to be overcome by the spring on opening the a e t e latte the total hydraulic Pressure 10 valve. quired for lifting the cylinder would act upon 10 According to my invention the valve is partly the valve body 1. But owing to the .fact that. or totally released from this pressure so that the now the flushing Wa er is l w to W y h opening spring can be weaker than before. ducts I l into the space beneath the piston I2, the

The valve may be released by making the valve hyd Pressure acting 011-the pp Sides body, which closes'the openings through which of the valve body whereby this body is partly or 15 the water flows down to the chisel, slmultanewholly released from the load. ously close a hollow space situated beneath the In t medifleetieh Shown in 2 e V e valve body and communicating with the interior body 1 is shaped in the form of 8 hOllOW n r of the tubing. By choosing the lower surface of which isenlarged at its bottom end to e Disteh I2.

the valve body touched by the flushing fluid sliding in the i ng st n the 20 exactly equal to the upper surface of the valve y 1 Presses the latter against S Se te body touched by the flushing water the valve Valve y 1 is raised when the V e od 8 body will be wholly released from t hydraulic strikes on a cross-bar provided in the piston I2. press' e. However to ensure a perfechclosureoi A distance as l as desired is left between this I the valve the lower surface will be chosen somecross-bar aha the rod 8 whereby t Stroke of 25 v what smaller tha th upper one so t t the valve is made more or less independent of the I valve is pressed against its seat by'a small excess stroke of the cylinderof pressure. In Fig. 3 the valve I is shaped to form a ball I.

Another method of releasing the valveconsists This hell 118$ loosely on the V v bar But in providing, besides the s rin for opening t owing to the fact that the valve rod 8 is convalve shown, for instance, i my specification nected with the piston I 2 and the lower surface oi. 2,108,946 issued February 22, 1938 r which isin contact with the flushing water and a further spring having a strength nearly sumcommunicates with the interior of the tubing, cient to compensate the pressure acting on the n is nearly equal to the Surface of the hell 7 valve. which is loaded by hydraulic pressure,- the valve 35 In the annexed drawings, Figs. 1 to 5, flve body 1 is also released from the hydraulic presdifl'erent modifications of the invention are illustrated in vertical cross-section. Fig. 61s a hori- In modifications shown i Fi s. ,1 to 3 the zontal cross-section on the line AB of Fig, 1. water t s h cylinder 3 o t e tubin 40 Fig. 7 is a diagrammatic view showing the 00- thereby lift t e cy u l e sprin l 4ov operation of the tubing, the cylinder and the bit (Fi ins rt d tw n th tu a the or chisel. cylinder 3 is compressed to such an extent that In the modifications shown in Figs. 1, 2, 3, it overcomes the weight of the valve body I. and 5 the valve is released by the lower surface In the modification shown in Fi 5v t e Va ve of the valve body (or an element acting on the body I is double-seated. Here the releasing water 45 same) being exposed to the flushing fluid flowing is conducted, as in the'valve wn n F 2;

in the tubing. through a duct bored in the valve body to the :Ihe valve shown in Fig. 4is released by a ower Surface of the b y- 1 spring. Fig. 4 shows the valve rod 8 connected'wlth Referring first to Fig. 1, I is the stationary a disk and a releasing spring I3 arranged under 50 bore tubing on which a cylinder 3 slides with a this disk which spring is compressed when the stuffing box 2. The tubing I is equipped with a cylinder 3 after opening the valve I drops down, piston 4 over which the cylinder 3 slides. The because the valve rod is taken along downwards hollow space of the tubing is enlarged to form a, when the cylinder drops down. In this case the 56 valve chamber 5 in which the valve seat 6 is water pressure is compensated by the spring I3 so that the spring I4 is only to lift the weight of the valve including the part suspended therefrom.

I claim:-

1. In a hydraulic motor operated by means of a flushing liquid in a well, the combination of a hollow shaft, a piston connected with said shaft, a cylinder slidably enclosing thepiston, a chisel carried by said cylinder, the piston being-provided with an opening, a valve adapted to close said opening, a spring inserted between the valve and the cylinder and actuating the valve and a member inserted between the valve and the stationary part of the motor which member releases the valve when opened from the water pressure .acting thereon, the tubing being provided with outlet ducts below the valve.

2. In a hydraulic motor operated by means of a flushing liquid in a well, the combination of a hollow shaft, a piston connected with said shaft, a cylinder slidably enclosing the piston, a chisel carried by said cylinder, the piston being provided with an opening, a valve adapted to close said opening, a spring inserted between the valve and the cylinder and actuating the valve, a rod inserted between the valve and the stationary part of the motor which rod releases the valve when opened from the water pressure acting thereon, the tubing being provided with outlet ducts below the valve, and a second piston adapted to slide in the valve chamber beneath its openings and connected with the said rod, the

' lower side of the said second piston communicating with the hollow tubing.

3. In a hydraulic motor operated by means of a flushing liquid in a well, the combination of a hollow shaft, a piston connected with said shaft, a cylinder slidably enclosing the piston, a chisel carried by said cylinder, a chamber communieating with the hollow tubing and provided with openings for withdrawing flushing water, a valve body shaped in the form of a. hollow cylinder and adapted to slide with its lower end beneath the openings on the walls of the chamber.

4. In a hydraulic motor operated by means of a flushing liquid in a well, the combination oi a hollow shaft, a piston connected with said shaft, a cylinder slidably enclosing the piston, a chisel carried by said cylinder, the piston being provided with an opening, a valve adapted to close said opening, a spring inserted between the valve and the cylinder and actuating the valve, a rod actuated by the upwards and downwards sliding cylinder and controlling the valve body, a collar on the said rod, 9. releasing spring abutting on the one hand against the said collar and on the other hand against the wall of the tubing, the force of the said spring being'nearly equal to the hy- "draulic pressure acting upon the valve body.

5. In a hydraulic motor operated by means of a flushing liquid in a well, the combination of a hollow shaft, a piston connected with said shaft, a cylinder slidably enclosing the piston, a chisel carried by said cylinder, a chamber communicating with the hollow tubing and provided with openings for withdrawing flushing water towards the chisel, a valve body adapted to shut oil the said openings against the interior of the'chamher when the valve is closed, the valve body being touched by the flushing water at its upper and lower side when the valve is closed, and ducts in the lower part of the wall of the tubing adapted I to connect the lower side of the valve body with the part of the tubing situated above the valve ody.

6. In a hydraulic motor operated by means of a flushing liquid in a well, the combination of a hollow shaft, a piston connected with said shaft, a cylinder slidably enclosing the piston, a chisel carried by said cylinder, the piston being provided with an opening, a valve adapted to close said opening, a spring for opening the valve. a rod inserted between the said spring and the body of the valve, the said rod being divided into two parts between which an interstice is left, a collar provided on the said rod, and a releasing spring abutting against the said collar on the one hand and against the wall of the tubing on the other hand.

THEO SEH'ER. 

